It basically comes down to the fact you weren't the man she needed you to be... even now, you're still blaming anyone and anything around you. She's gone because of you... gone because you failed to apologize for showing interest in other women while in a 'committed' relationship. If a guy wastes nearly two weeks debating about whether or not to apologize for showing interest in other women... I would think he may have had more to do with these women.... that his hesitation means he may want them more than me. She gave you an ultimatum... those women or her.... your hesitation made her think you chose those other women.
Too much time has gone by... too much time for a decision that should've been immediate. You discredited yourself.... I don't blame her for leaving. If you can't figure out something as simple as this... I can only imagine what married life with you must've been like. It's a wonder the woman stayed at all...
"The weakest soul, knowing its own weakness, and believing this truth that strength can only be developed by effort and practice, will, thus believing, at once begin to exert itself, and, adding effort to effort, patience to patience, and strength to strength, will never cease to develop, and will at last grow divinely strong."
- James Allen